苏州混凝土水泥制品研究院有限公司

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发布时间:2020-01-06 00:00:00
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杂志简介

主办单位: 苏州混凝土水泥制品研究院有限公司
中国混凝土与水泥制品协会
  • 主编 : 李建华
  • 常务副主编 : 王春蓉
  • 刊期 : 月刊
  • 电话 : 0512-68285716
  • E-mail : sccpitg@126.com
  • 国内统一刊号(CN) : 32-1173/TU
  • 国际标准刊号(ISSN) : 1000-4637
  • 邮发代号 : 28-80
hunnitu 微信公众号
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混凝土研究

矿物掺合料混凝土抗氯离子渗透性能及时变规律
矿物掺合料混凝土抗氯离子渗透性能及时变规律
  • 王艺霖,王顺尧,刘巧玲,李广宁
2021年第5期
摘要
引用本文
摘   要:以非稳态氯离子迁移系数(D值)为指标,研究了复掺粉煤灰和矿粉的混凝土抗氯离子渗透性能及其时变规律。结果表明:降低水胶比,延长龄期(180 d以内)都能使混凝土的抗氯离子渗透性能增强;一定范围内,抗氯离子渗透性能均随矿粉掺量的增加而增加,随粉煤灰掺量的增加而降低,当矿粉掺量分别为37.5%、31.9%时,C30、C45混凝土的抗氯离子渗透性能最佳;随着龄期延长,C30、C45混凝土的D值差距增大;C30、C45混凝土在90 d、180 d的D值与粉煤灰、矿粉掺量之间的定量关系可用线性公式来表达;C30、C45混凝土的D值与龄期之间的定量关系可用基于Fick第二定律的幂函数表达,其中,指数a与粉煤灰掺量的关系可用高次多项式来表达。 Abstract: The resistance to chloride ion penetration and its time-dependent law of the concrete mixed with fly ash and slag powder were studied with the non-steady state chloride ion migration coefficient(D value) as index. The results show that the resistance to chloride ion penetration of concrete can be enhanced by reducing the water-binder ratio and extending the age (within 180 d). The resistance to chloride ion penetration increases with the increase of slag powder content and decreases with the increase of fly ash content. In certain extent, when the ratio of slag powder content to the total cementitious material reaches 37.5% and 31.9%, the resistance to chloride ion penetration of C30 and C45 concrete reaches the best. With the increase of age, the difference in D values of C30, C45 concrete will increase. Quantitative relationship between the D values of C30, C45 concrete at 90 d, 180 d age and the proportion of fly ash, slag powder in the total mass of the cementitious materials can be expressed by a linear formula. Quantitative relationship between the D values of C30 and C45 concrete and the age can be expressed by a power function based on the Fick’s second law. Relationship between the exponent a of the power function and the proportion of fly ash in the total mass of the cementitious materials can be expressed by a high-order polynomial.
王艺霖,王顺尧,刘巧玲,等.矿物掺合料混凝土抗氯离子渗透性能及时变规律[J].混凝土与水泥制品,2021(5):1-5. WANG Y L,WANG S Y,LIU Q L,et al.Study on the Anti-chloride Ion Penetration Performance and Time-dependent Law of Mineral Admixture Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTES,2021(5):1-5.
盐冻作用下混凝土力学性能研究及灰色预测
盐冻作用下混凝土力学性能研究及灰色预测
  • 徐存东1,2,3,黄 嵩1,3,刘子金1,3,李欣达1,3,李智睿1,3
2021年第5期
摘要
引用本文
摘   要:为探究混凝土的劣化规律,对混凝土的力学性能进行了预测,以试验室数据为基础,构建了各项力学性能指标的灰色GM(1,1)预测模型,预测各项指标的劣化规律。结果表明:以盐溶液作为冻融介质会加快试块的破坏,且不同盐溶液对试块的破坏程度存在一定差距;获得的灰色GM(1,1)预测模型精度满足要求,可用于预测灌区内混凝土建筑物的力学性能。研究成果可以为寒旱灌区混凝土建筑的寿命预测与后期维护提供参考,也可为不同类型混凝土的各项性能预测提供研究方法。 Abstract: In order to find out the deterioration law of concrete and predict the durability of concrete a grey GM (1,1) prediction model of durability indexes was established based on laboratory test datas to predict the deterioration law of each index. The results show that using salt solution as freeze-thaw medium can accelerate the damage of test block. There is a certain gap between the damage degree of different salt solutions to test block. The accuracy of the grey GM(1,1) prediction model meets the requirements, and can be used to predict the durability of concrete buildings in irrigation districts. The research results can provide a reference for life prediction and later maintenance of concrete buildings in cold and arid irrigation areas, and also provide research methods for performance prediction of different types of concrete.
徐存东,黄嵩,刘子金,等.盐冻作用下混凝土力学性能研究及灰色预测[J].混凝土与水泥制品,2021(5):6-10,32. XU C D,HUANG S,LIU Z J,et al.Mechanical Property Research and Grey Prediction of Concrete Under Salt Freezing[J].CHINA CONCRETE AND CEMENT PRODUCTES,2021(5):6-10,32.
低碱性电解水对粉煤灰砂浆性能的影响
低碱性电解水对粉煤灰砂浆性能的影响
  • 张天宇1 ,王 亮2,李秋义1,2
2021年第5期
摘要
引用本文
摘   要:采用pH值为9.5的低碱性电解水制备粉煤灰砂浆,通过对比不同粉煤灰掺量条件下,低碱性电解水粉煤灰砂浆(EM)和普通自来水粉煤灰砂浆(OM)的工作性及力学性能,研究了低碱性电解水对粉煤灰砂浆性能的影响。结果表明:EM的工作性优于OM;控制流动度在(210±5)mm时,各组粉煤灰掺量的EM单位用水量均小于OM;低碱性电解水能够提高粉煤灰砂浆的强度,还能激发粉煤灰的早期活性效应,从而提高粉煤灰砂浆的早期强度,EM的早期抗压强度发展速率较OM提高了11.7%。 Abstract: The low-alkaline electrolyzed water with pH of 9.5 was used as the mixing water to prepare fly ash mortar, and the effect of low-alkaline electrolyzed water on the performance of fly ash mortar was researched by comparing the workability and the mechanical properties of low-alkaline electrolyzed water fly ash mortar (EM) and the ordinary fly ash mortar (OM) with different fly ash contents. The results show that the workability of EM preceds that of the OM. The unit water consumption of EM is less than that of OM with the fluidity (210±5)mm. The low-alkaline electrolyzed water can improve the strength of fly ash mortar. Electrolyzed water can stimulate the early activity and improve the early curing age strength of fly ash mortar, during the early curing age,the compressive strength improvement rate of EM is 11.7% higher than that of OM.
张天宇,王亮,李秋义.低碱性电解水对粉煤灰砂浆性能的影响[J].混凝土与水泥制品,2021(5):11-15. ZHANG T Y,WANG L,LI Q Y.Effect of Low-alkaline Electrolyzed Water on the Performance of Fly Ash Mortar[J].CHINA CONCRETE AND CEMENT PRODUCTES,2021(5):11-15.
再生混凝土受压应力-应变本构关系研究
再生混凝土受压应力-应变本构关系研究
  • 李雪良1,杨海峰2,赵修敏3,4,刘成丽2,梁冬瑶2
2021年第5期
摘要
引用本文
摘   要:通过改变石粉(SP)含量(0、5%、10%、15%)和再生粗骨料(RCA)取代率(0、33%、66%、100%)进行了48个棱柱体受压应力-应变全曲线试验,研究了石粉、再生粗骨料对机制砂再生混凝土轴心抗压强度、峰值应变和弹性模量的影响。基于损伤力学原理,参考已有的普通混凝土应力-应变本构关系,建立了机制砂再生混凝土单轴受压应力-应变本构方程。结果表明:理论曲线与试验数据吻合度较好。 Abstract: 48 prismatic specimens with full manufactured sand and different levels of recycled coarse aggregate (RCA) were prepared to test the compressive stress-strain curves. The effect of limestone powder (SP) in manufactured sand (0, 5%,10%, 15%) and RCA(0, 33%, 66%, 100%) on axial compressive strength, peak strain and elastic modulus of the concrete was studied. Based on the damage mechanics theory and the compressive constitutive relation of commom concrete, the stress-strain equation of concrete with recycled coarse aggregate and manufactured sand was established. The results show that the theoretical curves have high coincidence degree with the experimental data.
李雪良,杨海峰,赵修敏,等.再生混凝土受压应力-应变本构关系研究[J].混凝土与水泥制品,2021(5):16-20. LI X L,YANG H F,ZHAO X M,et al.Stress-strain Relationship of Recycled Concrete Under Uniaxial Compressive[J].CHINA CONCRETE AND CEMENT PRODUCTES,2021(5):16-20.
基于超声波测试的冻融循环作用下混凝土强度损伤演变研究
基于超声波测试的冻融循环作用下混凝土强度损伤演变研究
  • 黄奕霖1,严武建2,牛富俊1
2021年第5期
摘要
引用本文
摘   要:针对高寒地区混凝土抗冻耐久性问题,在混凝土中加入不同掺量的粉煤灰研究其抗冻性能,通过非金属声波检测仪进行冻融循环过程中混凝土强度无损测试,研究了冻融循环作用下混凝土强度损伤和动弹性力学参数的演化特征,分析了冻融循环过程中混凝土声波波速与力学性能变化规律。研究结果表明:掺入引气剂能够提高混凝土的抗冻性,相同引气剂掺量下,粉煤灰掺量为10%的混凝土抗冻性较好;冻融循环过程中,超声波纵波波速、横波波速与动弹性模量、动剪切模量均随着冻融循环次数的增加呈相似性衰减,且存在较高相关性。 Abstract: In view of the problem of frost resistance durability of concrete in alpine area, the frost resistance of concrete was studied by adding fly ash with different content. By using non-metallic acoustic wave detector to test the strength of concrete during freeze-thaw process, the characteristics of strength damage and dynamic elastic mechanical parameters evolution of concrete under freeze-thaw cycle were studied. The change law of concrete acoustic wave speed and mechanical properties during the freeze-thaw cycle were analyzed. The results show that the frost resistance of concrete can be improved by adding air entraining agent, and the frost resistance of concrete with 10% fly ash content is better than that of 20% fly ash content under the same air entraining agent. The ultrasonic longitudinal wave velocity and shear wave velocity, dynamic elastic modulus and dynamic shear modulus attenuate similarly with the increase of freeze-thaw cycle times during freeze-thaw process, and there is a correlation between them.
黄奕霖,严武建,牛富俊.基于超声波测试的冻融循环作用下混凝土强度损伤演变研究[J].混凝土与水泥制品,2021(5):21-25. HUANG Y L,YAN W J,NIU F J.Study on Damage Evolution of Concrete Strength Under Freeze-thaw Cycles Action Based on Ultrasonic Tests[J].CHINA CONCRETE AND CEMENT PRODUCTES,2021(5):21-25.
Ⅲ级粉煤灰和石粉双掺对C50泵送混凝土可泵性的影响
Ⅲ级粉煤灰和石粉双掺对C50泵送混凝土可泵性的影响
  • 马 挺1,张美香2,田崇霏3,白召军1,霍 虎2,罗忠涛2,刘锦涛4
2021年第5期
摘要
引用本文
马挺,张美香,田崇霏,等.Ⅲ级粉煤灰和石粉双掺对C50泵送混凝土可泵性的影响[J].混凝土与水泥制品,2021(5):26-28. MA T,ZHANG M X,TIAN C F,et al.Effect of Grade Ⅲ Fly Ash and Stone Powder on Pumpability of C50 Pumping Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTES,2021(5):26-28.
缓凝型改性淀粉基减水剂的合成与性能研究
缓凝型改性淀粉基减水剂的合成与性能研究
  • 钱亚杰1,曹利敏1,万秀琴2
2021年第5期
摘要
引用本文
钱亚杰,曹利敏,万秀琴.缓凝型改性淀粉基减水剂的合成与性能研究[J].混凝土与水泥制品,2021(5):29-32. QIAN Y J,CAO L M,WAN X Q.Study on the Synthesis and Performance of Retarding Modified Starch-based Water Reducer[J].CHINA CONCRETE AND CEMENT PRODUCTES,2021(5):29-32.

水泥混凝土制品

通电加速锈蚀后弹卡式连接接头预制桩抗弯性能研究
通电加速锈蚀后弹卡式连接接头预制桩抗弯性能研究
  • 刘伟扬1,龚顺风1,徐铨彪2, 3,陈 刚2, 3,刘承斌1,樊 华4
2021年第5期
摘要
引用本文
摘   要:为研究弹卡式连接预应力混凝土方桩在滨海环境下长期工作的耐久性能,对弹卡式连接与传统焊接式连接方桩接头试件进行了通电加速锈蚀试验,并对劣化后两种方桩接头试件进行了抗弯性能试验。结果表明:劣化后的弹卡式连接方桩接头试件整体连接性能保持完好,其开裂弯矩和极限弯矩试验值与桩身理论计算值较接近,试件受弯破坏形式为接头底部被拉开,弹卡连接件中插杆从小套筒中拔出而破坏;劣化后的焊接式连接方桩接头试件焊缝连接处锈蚀严重,其开裂弯矩和极限弯矩试验值相较桩身理论计算值下降幅度较大,试件受弯破坏形式为接头底部连接焊缝直接拉开,跨中接头底部两侧端板完全脱离。 Abstract: In order to study the long-term durability of prestressed concrete square piles with resilient clamping connection in coastal environments, the accelerated corrosion tests were conducted on prestressed concrete square piles with resilient clamping connection and traditional welded connection, and the flexural performance tests of two kinds of square pile joint specimens were conducted. The results show that the overall connection performance of the deteriorated square pile joint specimens with resilient clamping connection remains intact and the test values of cracking moment and ultimate moment are close to the theoretical calculation values of the pile body. The flexural failure mode of the specimens is that the bottom of the connection joint is pulled apart, and the inserting rod in resilient clamping connector is pulled out from the small sleeve. However, the weld seam of the welded square pile joint specimens are corroded seriously. Compared to the theoretical values, the cracking and ultimate bending moment of the welded square pile joint specimens after corrosion deterioration are significantly reduced. The flexural failure mode of the specimen is that the connecting weld seam at the bottom of the joint is pulled apart, and the end plates on both sides of the bottom are completely separated.
刘伟扬,龚顺风,徐铨彪,等.通电加速锈蚀后弹卡式连接接头预制桩抗弯性能研究[J].混凝土与水泥制品,2021(5):33-38. LIU W Y,GONG S F,XU Q B,et al.Study on Flexural Performance of Prestressed Concrete Square Pile with Resilient Clamping Connection Joint After Electricity Accelerates Corrosion[J].CHINA CONCRETE AND CEMENT PRODUCTES,2021(5):33-38.
预制装配式混凝土电缆沟力学性能数值模拟分析
预制装配式混凝土电缆沟力学性能数值模拟分析
  • 胡 坚,吴 军,章志鸿,赵 强
2021年第5期
摘要
引用本文
胡坚,吴军,章志鸿,等.预制装配式混凝土电缆沟力学性能数值模拟分析[J].混凝土与水泥制品,2021(5):39-42. HU J,WU J,ZHANG Z H,et al.Numerical Simulation Study on Mechanical Performance of Prefabricated Concrete Cable Pits[J].CHINA CONCRETE AND CEMENT PRODUCTES,2021(5):39-42.
预制蝶形腹板混凝土箱梁抗弯性能研究
预制蝶形腹板混凝土箱梁抗弯性能研究
  • 焦广如,陈建兵,张云飞
2021年第5期
摘要
引用本文
摘   要:为了解预制蝶形腹板混凝土箱梁在荷载作用下的受力特点、破坏形态、变形能力以及腹板中钢筋内力分布等情况,设计制作了预制蝶形腹板混凝土箱梁试件,并对其受弯性能进行了试验研究,采用对称加载,得到了完整的荷载-挠度曲线,沿高度纵向应变曲线、钢筋屈服曲线、沿纵向跨径方向挠度曲线。研究表明,在对称荷载作用下,预制蝶形腹板混凝土箱梁表现为弯曲破坏,同时,伴随着弯剪断腹板接缝处出现断裂,结构失效。针对挠度,对比分析了费氏空腹理论变形公式计算值、有限元分析值和试验值,三者吻合性良好,研究结果可为预制蝶形腹板混凝土箱梁的进一步研究和工程应用提供参考。 Abstract: In order to understand the precast butterfly wen box girder stress characteristics, failure form, deformation capacity and internal force distribution of the steel bars in the web, a  precast butterfly web concrete box is designed and manufactured. The beam model specimens are loaded with symmetrical distribution to obtain a complete load-deflection curve, along the height longitudinal strain curve, the steel bar yield curve, and the deflection curve along the longitudinal span direction, to conduct experimental research on its bending performance. The results have shown that under the action of symmetrical loads, the butterfly-shaped web box girder fails in bending, and the joints of the webs are broken together with the bending and shearing, resulting in structural failure. According to the deformation formula deduced by Fischer’s fasting principle and the comparative analysis between the finite element simulation value and the test value, the coincidence performance is good. The actual measurement results verify the rationality of the finite element and theoretical formulas, and the research results can provide a reference for the further research and engineering application of the butterfly web box girders.
焦广如,陈建兵,张云飞.预制蝶形腹板混凝土箱梁抗弯性能研究[J].混凝土与水泥制品,2021(5):43-47. JIAO G R,CHEN J B,ZHANG Y F,et al.Study of Bending Performance of Precast Butterfly Web Concrete Box Girders[J].CHINA CONCRETE AND CEMENT PRODUCTES,2021(5):43-47.

纤维水泥及制品

混杂纤维轻骨料混凝土力学性能试验研究
混杂纤维轻骨料混凝土力学性能试验研究
  • 张 萌1,骆文进2
2021年第5期
摘要
引用本文
摘   要:针对当前高层建筑物中普通混凝土自重大,而轻骨料混凝土强度较普通混凝土低的现状,以不同玄武岩纤维体积率(Vb)、聚丙烯纤维体积率(Vp)和陶粒代取代率(Rc)为影响因素,利用正交试验法设计了9组混杂纤维轻骨料混凝土(HF-LWC),进行了抗压强度、抗折强度和劈裂抗拉强度试验,并基于试验结果建立了强度预测模型。结果表明:三种因素对抗折强度的提升幅度大于对抗压强度和劈裂抗拉强度的提升幅度,最大增幅为45.23%;随着Vb的增加,HF-LWC的强度逐渐增大,且Vb对HF-LWC强度的影响最显著;当Vb为0.2%、Vp为0.1%、Rc为10%时,HF-LWC强度最佳;拟合得出的HF-LWC抗压强度、抗折强度和劈裂抗拉强度模型的精度较高。 Abstract: In view of the current situation that the self-weight of ordinary concrete in high-rise buildings, and the strength of lightweight aggregate concrete is lower than that of ordinary concrete. Taking different basalt fiber volume ratio (Vb), polypropylene fiber volume ratio (Vp) and ceramsite replacement rate(Rc) as influencing factors, 9 groups of hybrid fiber lightweight aggregate concrete (HF-LWC) were designed by orthogonal test method, and the compressive strength, flexural strength and split tensile strength tests were carried out, and the strength predictive models were established based on the test results. The results show that the increase in flexural strength of the three factors is greater than the increase in compressive strength and split tensile strength, with the maximum increase of 45.23%. With the increase of the basalt fiber volume ratio, the strength of HF-LWC gradually increases, and the basalt fiber volume ratio has the most significant influence on the strength of HF-LWC. When the basalt fiber volume ratio is 0.2%, polypropylene fiber volume ratio is 0.1% and ceramsite replacement rate is 10%, the strength of HF-LWC is the best. The accuracy of HF-LWC compressive strength, flexural strength and splitting tensile strength models are high.
张萌,骆文进.混杂纤维轻骨料混凝土力学性能试验研究[J].混凝土与水泥制品,2021(5):48-52. ZHANG M,LUO W J.Experimental Study on Mechanical Properties of Hybrid Fiber Lightweight Aggregate Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTES,2021(5):48-52.
钢棉对超高性能混凝土(UHPC)性能的影响研究
钢棉对超高性能混凝土(UHPC)性能的影响研究
  • 周南南
2021年第5期
摘要
引用本文
周南南.钢棉对超高性能混凝土(UHPC)性能的影响研究[J].混凝土与水泥制品,2021(5):53-55. ZHOU N N.Study on the Influence of Steel Wool on the Performance of Ultra-high Performance Concrete(UHPC)[J].CHINA CONCRETE AND CEMENT PRODUCTES,2021(5):53-55.
PVA纤维混凝土力学性能增长规律研究
PVA纤维混凝土力学性能增长规律研究
  • 曹雅娴1,侯慧芳2,刘曙光3,赵建军3a,徐勇彪4
2021年第5期
摘要
引用本文
摘   要:研究了PVA纤维长度和体积掺量对轴心抗压强度和抗折强度的影响,并采用灰色理论模型分析了轴心抗压强度和抗折强度随龄期的变化规律。结果表明:PVA纤维的掺入在一定程度上改善了混凝土的轴心抗压强度和抗折强度;非等时距GM(1,1)模型的预测精度较高。 Abstract: The effects of PVA fiber length and volume content on the axial compressive strength and flexural strength were studied, and the gray theory model was used to analyze the variation of axial compressive strength and flexural strength with age. The results show that PVA fiber can improve the axial compressive strength and flexural strength of concrete to a certain extent, and the non-equal interval GM (1,1) model has high prediction accuracy.
曹雅娴,侯慧芳,刘曙光,等.PVA纤维混凝土力学性能增长规律研究[J].混凝土与水泥制品,2021(5):56 -59. CAO Y X,HOU H F,LIU S F,et al.Study on the Growth Law of Mechanical Properties of PVA Fiber Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTES,2021(5):56 -59.

房建材料及制品

SFRC/SCC钢筋复合梁受弯性能试验研究
SFRC/SCC钢筋复合梁受弯性能试验研究
  • 苏 骏1,2,钱维民1,柯 骄1
2021年第5期
摘要
引用本文
摘   要:设计了一批受拉区为SFRC、受压区为SCC的钢筋复合梁,分析了纵筋配筋率、SFRC替换层钢纤维体积掺量以及替换层高度对复合梁在四点弯曲荷载作用下的承载力、挠度以及裂缝形态的影响,并与普通混凝土梁进行了对比。通过理论分析计算得出了SFRC/SCC复合梁的承载力表达式,并将理论计算结果与试验数据进行了对比分析,以验证表达式的合理性。结果表明:配筋率是提升复合梁承载力的首要因素,1.32%配筋率相对于0.79%配筋率的极限承载力最大可提升24.1%;钢纤维替换层对复合梁的承载力提升并不明显,但对于复合梁的挠度与裂缝宽度控制有明显作用,将替换层高度由50 mm提升至150 mm时,复合梁的挠度和主裂缝宽度最大分别降低了9.2%和77.81%。 Abstract: A batch of reinforced composite beams with SFRC tension zone and SCC compression zone were designed, and the effects longitudinal reinforcement ratio, SFRC replacement layer steel fiber volume content and replacement layer height on the bearing capacity, deflection and crack shape of composite beams under the four-point bending load were analyzed, and compared with ordinary concrete beams. Through theoretical analysis and calculation, the expression of the bearing capacity of SFRC/SCC composite beams was obtained, and the theoretical calculation results were compared with the experimental datas to verify the rationality of the expression. The results show that the reinforcement ratio is the primary factor to improve the bearing capacity of composite beams. Compared with the reinforcement ratio of 0.79%, the ultimate bearing capacity can be increased by 24.1% at the maximum reinforcement ratio of 1.32%. The steel fiber replacement layer does not significantly improve the bearing capacity of composite beams, but it has an obvious effect on the deflection and crack width control of composite beams. When the replacement layer height is increased from 50 mm to 150 mm, the deflection and main crack width of composite beams are reduced by 9.2% and 77.81% respectively.
苏骏,钱维民,柯骄.SFRC/SCC钢筋复合梁受弯性能试验研究[J].混凝土与水泥制品,2021(5):60 -64,70. SU J,QIAN W M,KE J.Experimental Study on the Flexural Performance of SFRC/SCC Reinforced Composite Beams[J].CHINA CONCRETE AND CEMENT PRODUCTES,2021(5):60 -64,70.
无腹筋混凝土受剪梁声发射灰色理论预测模型
无腹筋混凝土受剪梁声发射灰色理论预测模型
  • 李向阳,秦拥军,吕旭滨
2021年第5期
摘要
引用本文
摘   要:建立了无腹筋混凝土梁受剪破坏中声发射现象的声发射灰色预测模型,并采用修正方法对模型进行了修正。结果表明:采用两次修正、调整系数a和一次修正三种方法引入修正系数对GM(1,1)模型的预测精度有较大提高,对声发射(AE)累计事件数的数值预测效果有较好的拟合性,AE累计事件数变化趋势的预测结果与试验结果之间的差异较小,可以实现对无腹筋混凝土梁受剪破坏的判别与预测。 Abstract: The grey theory prediction model of acoustic emission in shear failure of concrete beams without abdominal reinforcement was established, and the model was modified by the modified method. The results show that the prediction accuracy of GM (1,1) model is greatly improved by using the three methods of two corrections, adjustment coefficient a and one correction to introduce correction coefficients, and the acoustic emission(AE) accumulative total number of the numerical prediction results have good fitting, and the difference between the predicted results and experimental results of AE accumulative events  change trend is low, which can realize the discrimination and prediction of the shear failure of concrete beams without abdominal reinforcement.
李向阳,秦拥军,吕旭滨.无腹筋混凝土受剪梁声发射灰色理论预测模型[J].混凝土与水泥制品,2021(5):65-70. LI X Y,QIN Y J,LYU X B.Grey Theory Prediction Model of Acoustic Emission of Concrete Beam Without Abdominal Reinforcement[J].CHINA CONCRETE AND CEMENT PRODUCTES,2021(5):65-70.
预制高强硅酸盐墙板力学性能试验研究
预制高强硅酸盐墙板力学性能试验研究
  • 谢国庆,任 虎,罗 双,付汝宾,孔德文
2021年第5期
摘要
引用本文
摘   要:研究了高强硅酸盐墙板的抗压性能及破坏形态,提出了标准试块受压应力-应变本构方程,通过ABAQUS有限元软件进行了数值模拟,并与试验结果进行了对比。结果表明:标准试块受压应力-应变全过程曲线的形状和普通混凝土相似,峰值应力前曲线接近直线,达到峰值应力后,应力迅速跌落;可采用二段式曲线拟合高强硅酸盐墙板标准试块的单轴受压应力-应变关系,得出其本构模型;试件的破坏形态为脆性破坏,延性较差,抗压试件破坏时两板面出现竖向裂缝,两孔间肋出现竖向裂缝和斜裂缝;试件承载力较高,满足现有规范对建筑用隔墙条板的强度要求。 Abstract: The compressive properties and failure mode of high-strength silicate wallboards were studied, and the stress-strain constitutive equation of the standard test block was put forward. The numerical simulation was carried out by ABAQUS finite element software, and the results were compared with the experimental results. The result shows that the shape of the compressive stress-strain entire process curve of the standard test block is similar to that of ordinary concrete, and it increases approximately linearly before reaching the peak stress, and drops rapidly after reaching the peak stress. The two-section curve can be used to fit the uniaxial compressive stress-strain relationship of the standard test block of the wallboard, and its constitutive model is given. The failure mode of the specimen is brittle failure with poor ductility, and when the compressive specimen is damaged, vertical cracks appear on the two plates, and vertical cracks and oblique cracks appear on the ribs between the two hole ribs. The bearing capacity of the specimen is high, which can meet the strength requirements of the existing codes for artition board used in buildings.
谢国庆,任虎,罗双,等.预制高强硅酸盐墙板力学性能试验研究[J].混凝土与水泥制品,2021(5):71-75. XIE G Q,REN H,LUO S,et al.Experimental Study on Mechanical Properties of Prefabricated High-strength Silicate Wallboards[J].CHINA CONCRETE AND CEMENT
圆钢管微膨胀陶粒混凝土短柱轴压极限承载力计算公式
圆钢管微膨胀陶粒混凝土短柱轴压极限承载力计算公式
  • 李 秀1,朱红兵2,韩 帅2
2021年第5期
摘要
引用本文
李秀,朱红兵,韩帅.圆钢管微膨胀陶粒混凝土短柱轴压极限承载力计算公式[J].混凝土与水泥制品,2021(5):76-79. LI X,ZHU H B,HAN S.Ultimate Bearing Capacity Calculation Formula of Micro-expansive Ceramsite Concrete Steel Tubular Short Column Under Axial Compression[J].CHINA CONCRETE AND CEMENT PRODUCTES,2021(5):76-79.
纤维增强混凝土耗能墙-钢筋混凝土框架结构抗震性能数值研究
纤维增强混凝土耗能墙-钢筋混凝土框架结构抗震性能数值研究
  • 张妍青1,吕高勇2
2021年第5期
摘要
引用本文
摘   要:在高性能纤维增强混凝土(HPFRC)耗能墙-钢筋混凝土(RC)框架结构抗震性能试验研究的基础上,考虑了RC框架混凝土强度等级、框架柱配筋率、框架柱截面尺寸三个因素,进行了有限元模拟分析。结果表明:建立的HPFRC耗能墙-RC框架结构有限元模型较为准确,有限元计算结果与试验结果吻合较好;随着RC框架混凝土强度等级的提升,试件各个荷载特征点的水平承载力均有所提高,但变形能力变化不大;随着框架柱配筋率和框架柱截面尺寸的增大,试件各个荷载特征点的水平承载力均明显提高,极限位移也有所增加;为了保证此类结构的抗震性能,针对RC框架混凝土强度等级、框架柱配筋率和框架柱截面尺寸,提出了可供设计参考的相关建议值。 Abstract: Based on the experimental study on seismic performance of high performance fiber reinforced concrete (HPFRC) energy dissipation wall-reinforced concrete (RC) frame structure, three factors of RC frame concrete strength grade, frame column reinforcement ratio, and frame column section size were considered to carried out finite element simulation analysis. The results show that the established finite element model of HPFRC energy dissipation wall-RC frame structure is accurate, and the finite element calculation results are in good agreement with the experimental results. With the increase of the RC frame concrete strength grade, the horizontal bearing capacity of each load characteristic point of the specimen is improved, but the deformation capacity changes little. With the increase of the frame column reinforcement ratio and the frame column section size, the horizontal bearing capacity of each load characteristic point of the specimen is significantly increased, and the ultimate displacement is also increased. In order to ensure the seismic performance of this kind of structure, the relevant recommended values for design reference are put forward for the RC frame concrete strength grade, frame column reinforcement ratio and frame column section size.
张妍青,吕高勇.纤维增强混凝土耗能墙-钢筋混凝土框架结构抗震性能数值研究[J].混凝土与水泥制品,2021(5):80-84. ZHANG Y Q,LYU G Y.Numerical Study on Seismic Performance of HPFRC Energy Dissipation Wall-RC Frame Structure[J].CHINA CONCRETE AND CEMENT PRODUCTES,2021(5):80-84.

检测及试验方法研究

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节能与环保

再生微粉对超高性能混凝土力学性能和微观结构的影响
再生微粉对超高性能混凝土力学性能和微观结构的影响
  • 何智海1,2,张梦圆1,詹培敏3,杨一凡1,兰 波1
2021年第5期
摘要
引用本文
摘   要:研究了两种类型的再生微粉(混凝土粉和砖粉)取代部分硅灰对超高性能混凝土(Ultra-high Performance Concrete,UHPC)力学性能和微观结构的影响。结果表明:混凝土粉的掺入降低了UHPC的力学性能,而砖粉取代15%硅灰时,UHPC的28 d抗压强度和抗折强度分别达到了130 MPa和24 MPa,略高于基准组;相较于混凝土粉,在UHPC中掺入15%的砖粉能够优化混凝土的内部结构;砖粉良好的微集料填充作用和火山灰效应增强了界面过渡区的黏结性能和水化产物的纳观力学性能,从而改善UHPC的微观结构。 Abstract: The effect of replacing part of silica fume with two kinds of hybrid recycled powder (concrete powder and brick powder) on the mechanical properties and microstructure of ultra-high performance concrete (UHPC) was studied. The results show that the addition of concrete powder reduces the mechanical properties of UHPC, while the 28 d compressive strength and flexural strength of UHPC reach 130 MPa and 24 MPa respectively when 15% silica fume is replaced by brick powder, which are slightly higher than those of the reference group. Compared with concrete powder, mixing 15% brick powder in UHPC can optimize the internal structure of concrete. The good micro-aggregate filling effect and pozzolanic properties of brick powder enhance the cohesiveness of the interface transition zone and the nanomechanical properties of the hydration products, thus improving the microstructure of UHPC.
何智海,张梦圆,詹培敏,等.再生微粉对超高性能混凝土力学性能和微观结构的影响[J].混凝土与水泥制品,2021(5):85-90. HE Z H,ZHANG M Y,ZHAN P M,et al.Effect of Hybrid Recycled Powder on Mechanical Properties and Microstructure of Ultra-high Performance Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTES,2021(5):85-90.
利用电解锰渣制备活性粉末混凝土的研究
利用电解锰渣制备活性粉末混凝土的研究
  • 季军荣1,武双磊2,陈 宇2,周 洲1,陈胡星2
2021年第5期
摘要
引用本文
摘   要:研究了电解锰渣取代石英粉或矿渣微粉对活性粉末混凝土(RPC)强度、收缩率和重金属浸出毒性的影响。结果表明:电解锰渣部分取代石英粉或矿渣微粉,RPC的抗压强度总体上有所提高,而抗折强度稍有下降;干缩率与湿胀率均降低;重金属浸出浓度均低于Ⅴ类地表水限值。 Abstract: The effects of electrolytic manganese residue instead of quartz powder or slag powder on the strength, shrinkage and heavy metal leaching toxicity of reactive powder concrete (RPC) were studied. The results show that using electrolytic manganese residue to partially replace quartz powder or slag powder, the compressive strength of RPC is generally improved, while the flexural strength is slightly reduced, the dry shrinkage and wet swelling rate of RPC are both reduced, and the leaching concentration of heavy metals is below Class V surface water limit.
季军荣,武双磊,陈宇,等.利用电解锰渣制备活性粉末混凝土的研究[J].混凝土与水泥制品,2021(5):91-94,99. JI J R,WU S L,CHEN Y,et al.Study on the Preparation of Reactive Powder Concrete with Electrolytic Manganese Residue[J].CHINA CONCRETE AND CEMENT PRODUCTES,2021(5):91-94,99.
不同材料增强处理再生骨料对混凝土抗压强度的影响
不同材料增强处理再生骨料对混凝土抗压强度的影响
  • 孙柯华1,沈 阳2,王 伟3,罗 锋3,杨雅诗4,韦建斌5,章乐远3,冯兴国3, 胡 坤3,徐逸文3
2021年第5期
摘要
引用本文
摘   要:研究了水泥浆、偏高岭土地聚物、掺粉煤灰偏高岭土地聚物、水泥浆-偏高岭土地聚物增强处理再生骨料对混凝土抗压强度的影响。结果表明:四种增强材料处理的再生骨料对混凝土抗压强度的影响顺序大小为水泥浆-偏高岭土地聚物>偏高岭土地聚物>水泥浆>掺粉煤灰偏高岭土地聚物。 Abstract: The effects of cement slurry, metakaolin geopolymer, metakaolin geopolymer with fly ash and cement slurry-metakaolin geopolymer on compressive strength of concrete were studied. The results show that the influence order of recycled aggregate reinforced by four materials on compressive strength of concrete is cement slurry-metakaolin geopolymer > metakaolin geopolymer > cement slurry > metakaolin geopolymer with fly ash.
孙柯华,沈阳,王伟,等.不同材料增强处理再生骨料对混凝土抗压强度的影响[J].混凝土与水泥制品,2021(5):95-99. SUN K H,SHEN Y,WANG W,et al.Effects of Recycled Aggregate Reinforced by Different Materials on Compressive Strength of Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTES,2021(5):95-99.
原状粉煤灰-铁尾矿泡沫混凝土的性能研究
原状粉煤灰-铁尾矿泡沫混凝土的性能研究
  • 孙 婧1,2,3,王 宏1,陈 静4,安艳玲1,兰建伟1,刘宏波1,3
2021年第5期
摘要
引用本文
摘   要:采用Design-Expert软件研究了原状粉煤灰及铁尾矿砂对泡沫混凝土干密度、吸水率及抗压强度的影响,并观察了泡沫混凝土断面的细观结构。结果表明:原状粉煤灰掺量的增加会使泡沫混凝土的干密度和吸水率降低,当原状粉煤灰掺量占胶凝材料的40%时,泡沫混凝土的抗压强度最高;固定粉煤灰掺量为40%,铁尾矿砂掺量在0~50%范围内增加会使泡沫混凝土的干密度和抗压强度增加,吸水率降低;当原状粉煤灰掺量<40%时,原状粉煤灰掺量越多,泡沫混凝土内部的气泡越稳定;铁尾矿砂掺量的增加可使泡沫混凝土的孔径减小,密实度增加。 Abstract: The influence of original fly ash and iron tailings on dry density, water absorption and compressive strength of foam concrete was studied by Design-Expert software, and the microstructure of foam concrete was observed. The results show that the dry density and water absorption rate of foam concrete decrease with the increase of raw fly ash content, and when the original fly ash content is 40%, the compressive strength of foam concrete is the highest. When the fixed fly ash content is 40%, the increase of iron tailings content in the range of 0~50% can increase the dry density and compressive strength of foam concrete, but reduce the water absorption. When the original fly ash content is less than 40%, the more the raw fly ash content, the more stable the bubbles inside the foam concrete. The increase of the iron tailings content can reduce the pore size of foam concrete and increase the density.
孙婧,王宏,陈静,等.原状粉煤灰-铁尾矿泡沫混凝土的性能研究[J].混凝土与水泥制品,2021(5):100-104. SUN J,WANG H,CHEN J,et al.Study on Properties of Original Fly Ash-iron Tailings Foam Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTES,2021(5):100-104.

书评

矸石电厂粉煤灰的活化及应用技术 ——评《矸石电厂粉煤灰的活化及应用》
矸石电厂粉煤灰的活化及应用技术 ——评《矸石电厂粉煤灰的活化及应用》
  • 冯月娥
2021年第4期
摘要
引用本文
我国混凝土工程建设飞速发展,水泥用量与日俱增。而生产水泥需要消耗大量能源,这与国家的绿色环保政策背道而驰。矸石电厂用的煤矸石燃烧后灰分较高,粉煤灰的产出量是燃煤电厂的2倍左右,产出的粉煤灰含碳量高,理化特性与燃煤电厂粉煤灰差别较大,且造成了严重的环境污染和土地资源浪费。矸石电厂粉煤灰的循环利用已逐渐引起了学术界的关注,成为了研究热点。陈杰编著的《矸石电厂粉煤灰的活化及应用》一书通过对矸石电厂粉煤灰的形貌特征、化学成分、矿物组成等进行分析,采用化学、物理和物理化学活化技术对粉煤灰-水泥胶砂体系进行激活,得出了合理的活化方案;此外,以矸石电厂粉煤灰取代水泥制造粉煤灰基膏体充填材料,实现废物循环利用。笔者通过学习,认为该书具有较强的实用性,对于实现循环经济具有一定的指导意义,现简要总结重点内容。
冯月娥.矸石电厂粉煤灰的活化及应用技术——评《矸石电厂粉煤灰的活化及应用》[J].混凝土与水泥制品,2021(4):103.

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  • 王 磊1,2,范 蕾1,2
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摘要
引用本文
摘   要:针对目前对珊瑚碎屑混凝土的力学机理尚不清晰这一问题,对不同龄期和水灰比的珊瑚混凝土试块进行了试验研究。试验结果表明,珊瑚混凝土具有早强、快硬的特点;同时,当水灰比减小到一定程度后,单纯减小水灰比并不能明显提高珊瑚混凝土的抗压强度。本文从材料特性、界面特性以及龄期和水灰比等方面着手,对珊瑚混凝土的强度特性作了详细分析,并介绍了珊瑚混凝土的破坏形态,从而可为珊瑚碎屑应用于海岛混凝土工程提供一定的参考依据。 Abstract: Currently, the mechanical mechanism of coral debris concrete is not well understood, so the research on coral concrete test block in different age and water cement ratio is carried out. The test results show that coral concrete has the characteristics of fast strengthening and hardening, and when the water cement ratio decreases to a certain extent, simply reducing the water cement ratio could not result in obvious additions of compressive strength of coral concrete. From the aspects of material properties, interface properties,age and water cement ratio, the strength characteristics of the coral concrete are analyzed in detail, and the failure pattern is introduced, which can provide reference for application of coral debris in island concrete engineering.
王磊,范蕾. 珊瑚碎屑混凝土的强度特性及破坏形态分析[J].混凝土与水泥制品,2015(1):1-4. WANG L,FAN L.Strength Characteristic and Failure Pattern Analysis on Coral Debris Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2015(1):1-4.
装配式结构用高强套筒灌浆料性能试验研究
装配式结构用高强套筒灌浆料性能试验研究
  • 汪秀石,杨智良,吴照学
2015年第2期
摘要
引用本文
摘   要:研究了装配式结构用高强套筒灌浆料的性能,通过试配并进行了流动度、强度和膨胀性试验,优选出了优化配合比。同时基于优化配合比进行了水胶比、减水剂掺量和膨胀剂掺量对高强套筒灌浆料性能影响的研究。试验结果表明,随着水胶比(W/B)增加,流动度逐渐增大,但强度随W/B增加呈现明显降低趋势;减水剂可有效改善流动度,而当掺量过多时对强度有一定的影响;膨胀率随膨胀剂掺量增加呈现增长趋势,但当掺量小于8.0%时,膨胀效果较差,掺量大于12.0%时,对流动度和强度产生不利影响。 Abstract: The properties of high-strong cementitious grout for prefabricated concrete structure are studied, and the optimum mix proportion is elected by the tests of fluidity, strength and expansibility. The roles of W/B and the content of superplasticizer or expanders in high-strong cementitious grout for coupler are researched respectively based on the optimum mix proportion. The test results show that the fluidity of the grout increases with the increasing of W/B, but its strength has significantly decreasing trend; the fluidity of the grout can be improved effectively by superplasticizer, but its strength will decrease if superplasticizer content is excessive; expansion rate of the grout increases with the increasing of expanders agent content, but the expansibility is poor when the content is less than 8.0%, and it has an adversely affect on the liquidity and strength of the grout when the content is greater than 12.0%.
汪秀石,杨智良,吴照学.装配式结构用高强套筒灌浆料性能试验研究[J].混凝土与水泥制品,,2015(2):65-68. WANG X S,YANG Z L,WU Z X.Experimental Research on Performance of High-strong Cementitious Grouting for Prefabricated Concrete Structure[J].CHINA CONCRETE AND CEMENT PRODUCTS,2015(2):65-68.
再生粗骨料强化处理工艺对再生混凝土性能的影响
再生粗骨料强化处理工艺对再生混凝土性能的影响
  • 郭远新,李秋义,孔 哲,岳公冰,韩 帅
2015年第6期
摘要
引用本文
摘   要:分别采用物理强化、化学强化和物理-化学复合强化三种不同的强化方式对简单破碎再生粗骨料进行强化处理,并采用100%取代天然碎石制备再生粗骨料混凝土,研究了不同强化处理后的再生粗骨料对混凝土工作性能、力学性能、抗渗透性能和抗碳化性能的影响。结果表明,经过强化处理的再生粗骨料混凝土的各项性能均有不同程度的提高,其中经二次物理强化处理后的再生粗骨料混凝土的用水量较天然碎石混凝土仅增加了6kg/m3,其抗压强度也达到最高值,接近于天然碎石混凝土;经二次物理强化和化学浸渍复合强化处理后的再生混凝土氯离子扩散系数降低了13.6%;三种不同的强化方式处理后,再生混凝土的碳化深度和碳化速度均有所降低。 Abstract: Three kinds of different strengthening technologies of physical enhancement, chemical enhancement and physical-chemical compound enhancement to strengthen the simple crushing recycled coarse aggregate are adopted, with 100% replaced natural gravel preparation of recycled coarse aggregate concrete, and the influences of the recycled coarse aggregate of different strengthening treatment on the working performance, mechanical properties, penetration resistance and carbonation resistance of concrete are studied. The research results show that, through strengthening treatment, recycled coarse aggregate concrete properties are improved to different degrees, the water consumption of recycled coarse aggregate concrete after the secondary physical strengthen treatment is only increased by 6kg/m3 than that of natural gravel concrete. The compressive strength also reached the highest value, close to the natural gravel concrete. The chloride ion diffusion coefficient of recycled concrete after the secondary physical-chemical compound strengthening treatment is reduced by 13.6%. The depth of carbonation and carbonation velocity decrease after three kinds of different strengthening treatments.
郭远新,李秋义,孔哲,等.再生粗骨料强化处理工艺对再生混凝土性能的影响[J].混凝土与水泥制品,2015(6):11-17. GUO Y X,LI Q Y,KONG Z,et al.Influence of Strengthening Treatment Technology of Recycled Coarse Aggregate on Performance of Recycled Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2015(6):11-17.
无砂再生透水混凝土配合比设计
无砂再生透水混凝土配合比设计
  • 张松涛1,贾欣悦2,宋 卓1,贾艳东1
2016年第12期
摘要
引用本文
张松涛,贾欣悦,宋卓,等.无砂再生透水混凝土配合比设计[J].混凝土与水泥制品,2016(12):6-12. ZHANG S T,JIA X Y,SONG Z,et al.Design on Mix Proportion of No-fines Pervious Recycled Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2016(12):6-12.
清水混凝土概念、研究现状、存在问题及配合比设计方 综述
清水混凝土概念、研究现状、存在问题及配合比设计方 综述
  • 郭 伟1,路林海2,王龙志3,崔 鑫3,王桂玲4,张海霞3
2016年第10期
摘要
引用本文
摘   要:20世纪90年代后期以来,清水混凝土研究及工程应用得到了长足发展,许多城市建成了清水混凝土标志性工程。为了更好地促进清水混凝土研究的深入、工程质量的提高,对清水混凝土的概念、研究现状、存在问题及现有的清水混凝土配合比设计方法进行了系统地梳理、总结。通过对清水混凝土现状的研究,可使相关领域技术人员认识到清水混凝土发展中存在的不足、明确清水混凝土的研究方向,以实现清水混凝土技术研究水平的再提高,有力地支持清水混凝土工程应用的进一步推广。 Abstract: Since the late 1990s, research and application of fair-faced concrete has made considerable progress, many cities built landmark projects of fair-faced concrete. In order to better promote the study in-depth and the engineering quality improvement of fair-faced concrete, the concept, research status, existing problems and mixture design methods of fair-faced concrete are systematically reviewed and summarized. Through the above study of fair-faced concrete, the relevant technicians recognize the lack of fair-faced concrete in the development and realize a clear research direction, in order to improve research level, strongly support further promotion of fair-faced concrete in engineering applications.
郭伟,路林海,王龙志,等.清水混凝土概念、研究现状、存在问题及配合比设计方法综述[J].混凝土与水泥制品,2016(10):23-27. GUO W,LU L H,WANG L Z,et al.Summary for Concept, Research Status, Existing Problems and Mix Proportion Design of Fair-faced Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2016(10):23-27.
新型装配式建筑构件生产及其施工技术的研究与应用
新型装配式建筑构件生产及其施工技术的研究与应用
  • 范 玉1,4,徐 华2,黄 新3,黄继战4,马北京4
2015年第12期
摘要
引用本文
摘   要:通过对建筑PC构件的设计、生产、施工进行的研究,对建筑PC构件进行了再设计及优化,确定了合理的PC构件生产及其施工工艺方案,并对影响PC构件质量的相关因素进行了分析。 Abstract: Through the research on design of PC component, production and construction,  construction PC component is carried out for re-design and optimization. The reasonable PC component production and construction technology program are determined, and factors affecting the quality of PC are analyzed.
范玉,徐华,黄新,等.新型装配式建筑构件生产及其施工技术的研究与应用[J].混凝土与水泥制品,2015(12):87-89. FAN Y, XU H,HUANG X,et al.Research and Application of Production for New Type of Prefabricated Construction Component and Its Construction Technology[J].CHINA CONCRETE AND CEMENT PRODUCTS,2015(12):87-89.
石墨烯纳米片对水泥基复合材料力学性能的影响
石墨烯纳米片对水泥基复合材料力学性能的影响
  • 王 辉,刘爱红,李 航
2015年第12期
摘要
引用本文
摘   要:采用球磨法将石墨烯纳米片分散在水泥基体中,研究了石墨烯纳米片掺量对水泥基材料抗折强度和抗压强度的影响。实验结果表明,适量的石墨烯纳米片可均匀分散在水泥基体中,通过桥联效应和拔出效应对水泥基材料起增强增韧作用,当石墨烯纳米片掺量为0.04%时,石墨烯纳米片与水泥基体界面结合良好,没有明显过渡层,试件3d抗折强度和抗压强度分别提高了22.84%和23.61%。 Abstract: Graphene nanoplatelets (GNPs) were dispersed in the cement matrix by milling method. The effect of GNPs with different contents on the flexural strength and compressive strength of composites were studied. The results showed that well dispersed GNPs improved the mechanical properties of cement composites, owing to GNPs excellent pulling-out and bridging capability. When the GNPs content was 0.04%, the mechanical properties of cement composites were increased obviously. Its flexural and compressive strength increased by 22.84% and 23.61% respectively compared with the referee sample after curing 3 days. The interface between graphene nanoplatelets and cement was bonded well, with no obvious transition layer.
王辉,刘爱红,李航.石墨烯纳米片对水泥基复合材料力学性能的影响[J].混凝土与水泥制品,2015(12):25-27. WANG H,LIU A H,LI H.Influence of Graphene Nanoplatelets on Mechanical Properties of Cement-based Composites[J].CHINA CONCRETE AND CEMENT PRODUCTS,2015(12):25-27.
大型智能PC构件自动化生产线简介
大型智能PC构件自动化生产线简介
  • 孙 红1,孙 健1,吴玉厚1,赵凯军2
2015年第3期
摘要
引用本文
摘   要:根据混凝土工厂化生产的需要,阐述了大型智能PC构件生产线的组成部分、工艺过程和技术重点;分析了该生产线中蕴含的微观物流、信息采集、分布式控制及多智能体的协同过程,总结了PC构件生产线的优点和技术创新突破点,可为大型智能PC构件全自动生产线的研制提供理论基础和技术依据。 Abstract: According to the needs of the concrete factory production, the large scale intelligent automatic PC production line the technological process and technical keys of PC component are introduced, the cooperative process of microscopic logistics, information acquisition, distributed control and multi-agent systems are analyzed, the advantages and technology innovation of PC components production line are summarized, which can provide theoretical basis and technical basis for large scale intelligent automatic production line of PC components.
孙红,孙健,吴玉厚,等.大型智能PC构件自动化生产线简介[J].混凝土与水泥制品,2015(3):45-48. SUN H,SUN J,WU Y H,et al.Introduction of Large Scale Intelligent PC Automatic Production Line[J].CHINA CONCRETE AND CEMENT PRODUCTS,2015(3):45-48.
建筑垃圾再生微粉的研究现状
建筑垃圾再生微粉的研究现状
  • 毛新奇1,2,屈文俊1,朱 鹏1
2015年第8期
摘要
引用本文
摘   要:建筑垃圾再生微粉各项性能的研究是推进建筑垃圾资源化的重要基础。根据近年来国内关于再生微粉的主要研究成果,对材料来源、制备工艺、工作性能、力学性能和耐久性能等方面进行了综述,并对相关的影响因素进行了探讨分析。 Abstract: Research on the properties of utilization regeneration of powder for construction waste is the important foundation of resource utilization of construction waste. Based on the recent domestic research on recycled powder, material source, manufacturing process, workability, mechanical properties and the durability are reviewed. Besides, the related influence factors are discussed and analyzed.
毛新奇,屈文俊,朱鹏.建筑垃圾再生微粉的研究现状[J].混凝土与水泥制品,2015(8):89-93. MAO X Q,QU W J,ZHU P.Study Status of Recycled Powder for Construction Waste[J].CHINA CONCRETE AND CEMENT PRODUCTS,2015(8):89-93.
再生粗骨料及再生混凝土性能研究进展
再生粗骨料及再生混凝土性能研究进展
  • 甘 福1,周脉席1,3,濮 琦2
2018年第9期
摘要
引用本文
摘   要:结合国内外再生粗骨料混凝土的研究现状,综述了再生粗骨料性能、再生粗骨料混凝土性能、再生混凝土改性方法及改性后的混凝土性能等方面内容,展望了再生粗骨料及再生混凝土未来研究方向。 Abstract: Combining the study of recycled coarse aggregate concrete at home and abroad, the property of recycled coarse aggregate, the performance of recycled coarse aggregate concrete, the modified method of recycled concrete and the performance of modified concrete are reviewed, and the fature research direction on recycled coarse aggregate and recycled concrete is prospected.
甘福,周脉席,濮琦.再生粗骨料及再生混凝土性能研究进展[J].混凝土与水泥制品,2018(9):102-107. GAN F,ZHOU M X,PU Q.Research Progress of Performance of Recycled Coarse Aggregate and Recycled Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2018(9):102-107.
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